1944218365 has 8 divisors (see below), whose sum is σ = 2333338200. Its totient is φ = 1555190592.

The previous prime is 1944218357. The next prime is 1944218389. The reversal of 1944218365 is 5638124491.

It can be written as a sum of positive squares in 4 ways, for example, as 247684644 + 1696533721 = 15738^2 + 41189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1944218365 - 2³ = 1944218357 is a prime.

It is a super-3 number, since 3×1944218365³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38307 + ... + 73183.

It is an arithmetic number, because the mean of its divisors is an integer number (291667275).

Almost surely, 2^1944218365 is an apocalyptic number.

It is an amenable number.

1944218365 is a deficient number, since it is larger than the sum of its proper divisors (389119835).

1944218365 is a wasteful number, since it uses less digits than its factorization.

1944218365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46031.

The product of its digits is 207360, while the sum is 43.

The square root of 1944218365 is about 44093.2916099490. The cubic root of 1944218365 is about 1248.0970222774.

The spelling of 1944218365 in words is "one billion, nine hundred forty-four million, two hundred eighteen thousand, three hundred sixty-five".